[llvm] r291207 - Revert "Use _Unwind_Backtrace on Apple platforms."

[Bob Wilson via llvm-commits]

Author: bwilson
Date: Thu Jan  5 20:26:33 2017
New Revision: 291207

URL: http://llvm.org/viewvc/llvm-project?rev=291207&view=rev
Log:
Revert "Use _Unwind_Backtrace on Apple platforms."

This reverts commit 63165f6ae3bac1623be36d4b3ce63afa1d51a30a.

After making this change, I discovered that _Unwind_Backtrace is
unable to unwind past a signal handler after an assertion failure.
I filed a bug report about that issue in rdar://29866587 but even if
we get a fix soon, it will be awhile before it get released.

Modified:
    llvm/trunk/lib/Support/Unix/Signals.inc

Modified: llvm/trunk/lib/Support/Unix/Signals.inc
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/Unix/Signals.inc?rev=291207&r1=291206&r2=291207&view=diff
==============================================================================
--- llvm/trunk/lib/Support/Unix/Signals.inc (original)
+++ llvm/trunk/lib/Support/Unix/Signals.inc Thu Jan  5 20:26:33 2017
@@ -48,7 +48,7 @@
 // _Unwind_Backtrace function, but on FreeBSD the configure test passes
 // despite the function not existing, and on Android, <unwind.h> conflicts
 // with <link.h>.
-#if defined(__GLIBC__) || defined(__APPLE__)
+#ifdef __GLIBC__
 #include <unwind.h>
 #else
 #undef HAVE__UNWIND_BACKTRACE